Unit, oscillator and electronic apparatus
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United States of America Patent
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Jul 1, 2014
Grant Date -
May 23, 2013
app pub date -
Jan 17, 2013
filing date -
Jun 30, 2003
priority date (Note) -
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Abstract
A unit comprises a quartz crystal resonator having a base portion, and first and second vibrational arms, each of the first and second vibrational arms having opposite main surfaces. At least two grooves are formed in at least one of the opposite main surfaces of each of the first and second vibrational arms so that a distance in the width direction of the at least two grooves measured from an outer edge of the one of the at least two grooves to an outer edge of the other of the at least two grooves is less than 0.05 mm.
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